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    <title>KaTeX – The fastest math typesetting library for the web</title>
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      <h1 class="logo tex" data-expr="\KaTeX">KaTeX</h1>
      <div class="tagline">
        The <em>fastest</em> math typesetting library for the web.
      </div>
      <div class="cta">
        <a href="docs/browser.html" role="button">
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          Installation
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          Documentation
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      <div class="demo">
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            <label for="demo-input">Type an expression:</label>
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          <textarea id="demo-input" spellcheck="false">
% \f is defined as #1f(#2) using the macro
\f\relax{x} = \int_{-\infty}^\infty
    \f\hat\xi\,e^{2 \pi i \xi x}
    \,d\xi</textarea>
        </div>
        <div class="demo-right">
          <div class="demo-instructions">
            See how it renders with <span class="tex" data-expr="\KaTeX">KaTeX</span>:
          </div>
          <div id="demo-output"></div>
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    <div class="main"><div class="container">
      <div class="subtagline">
        Simple API, no dependencies – yet super fast on all major browsers.
      </div>

      <ul class="features">
        <li><b>Fast:</b> KaTeX renders its math synchronously and doesn&rsquo;t need to reflow the page.</li>
        <li><b>Print quality:</b> KaTeX&rsquo;s layout is based on Donald Knuth&rsquo;s TeX, the gold standard for math typesetting.</li>
        <li><b>Self contained:</b> KaTeX has no dependencies and can easily be bundled with your website resources.</li>
        <li><b>Server side rendering:</b> KaTeX produces the same output regardless of browser or environment, so you can pre-render expressions using Node.js and send them as plain HTML.</li>
      </ul>

      <div class="examples">
        <div class="example tex" data-expr="\displaystyle \frac{1}{\Bigl(\sqrt{\phi \sqrt{5}}-\phi\Bigr) e^{\frac25 \pi}} = 1+\frac{e^{-2\pi}} {1+\frac{e^{-4\pi}} {1+\frac{e^{-6\pi}} {1+\frac{e^{-8\pi}} {1+\cdots} } } }"></div>
        <div class="example tex" data-expr="\displaystyle \left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)"></div>
        <div class="example tex" data-expr="\displaystyle {1 +  \frac{q^2}{(1-q)}+\frac{q^6}{(1-q)(1-q^2)}+\cdots }= \prod_{j=0}^{\infty}\frac{1}{(1-q^{5j+2})(1-q^{5j+3})}, \quad\quad \text{for }\lvert q\rvert<1."></div>
      </div>

      <div class="subtagline">
        Lightning-fast, even on pages with hundreds of expressions:
      </div>

      <div class="comparison-labels">
        <div class="left tex" data-expr="\KaTeX"></div>
        <div class="right">MathJax</div>
      </div>
      <div class="comparison"></div>

      <div class="cta">
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          Documentation
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    <div id="options-panel">
      <h3>KaTeX Options</h3>
      <table>
        <tr>
          <td><label for="displayMode">displayMode</label></td>
          <td><input type="checkbox" id="displayMode" checked/></td>
        </tr>
        <tr>
          <td><label for="leqno">leqno</label></td>
          <td><input type="checkbox" id="leqno"/></td>
        </tr>
        <tr>
          <td><label for="fleqn">fleqn</label></td>
          <td><input type="checkbox" id="fleqn"/></td>
        </tr>
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          <td><input type="checkbox" id="throwOnError" checked/></td>
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        <tr>
          <td><label for="errorColor">errorColor</label></td>
          <td><input type="color" id="errorColor" value="#cc0000"/></td>
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        <tr>
          <td><label for="strict">strict</label></td>
          <td>
            <select id="strict">
              <option value="error">error</option>
              <option value="warn" selected>warn</option>
              <option value="ignore">ignore</option>
            </select>
          </td>
        </tr>
        <tr>
          <td><label for="output">output</label></td>
          <td>
            <select id="output">
              <option value="htmlAndMathml" selected>htmlAndMathml</option>
              <option value="html">html</html>
              <option value="mathml">mathml</option>
            </select>
          </td>
        </tr>
        <tr>
          <td><label for="trust">trust</label></td>
          <td><input type="checkbox" id="trust"/></td>
        </tr>
      </table>
      <h4><label for="macros">macros</label></h4>
      <textarea id="macros" placeholder="JSON">
{
    "\\f": "#1f(#2)"
}</textarea>

      <h3>Editor Options</h3>
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